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目的:探讨MRI动态增强扫描在食管胃结合部腺癌上界定位中的临床意义。方法:回顾性分析2018年7月至2019年8月郑州大学附属肿瘤医院收治并行手术治疗的73例食管胃结合部腺癌患者的临床资料，所有患者均于术前1周内行MRI检查。首先在患者的Tn 2WI和扩散加权成像及动态增强图像上了解肿瘤的部位、大小、形态、信号及强化方式等情况，然后在动态增强扫描图像上独立测量肿瘤上界与贲门切迹的距离，并与手术大体标本中实测肿瘤上界与贲门切迹的距离进行对照。n 结果:本组73例患者的MRI测量肿瘤上界位置平均为(1.75±1.98)cm，手术大体标本测量平均为(1.72±1.97)cm，两组之间差异无统计学意义(n t＝0.572, n P＝0.569)。两组测量值的一致性为优(组内相关系数＝0.974，95% n CI：0.959～0.984，n P<0.01)。n 结论:MRI动态增强扫描测量的肿瘤上界与手术大体标本测量的结果基本一致，MRI动态增强扫描可用于食管胃结合部腺癌术前肿瘤上界的定位。“,”Objective:To investigate the clinical significance of MRI dynamic enhancement in defining the upper edge of adenocarcinoma of esophagogastric junction.Methods:The clinical data of 73 patients with adenocarcinoma on the esophagogastric junction operated from Jul 2018 to Aug 2019 in the Affiliated Cancer Hospital of Zhengzhou University were retrospectively analyzed. All patients underwent MRI examination within one week before surgery. First, the Tn 2WI, diffusion-weighted imaging and dynamic enhanced images of each patient were carefully observed to define the tumor location, size, shape, signal and enhancement mode, then the distances between the upper edge of the tumor and the cardiac incisure on MRI dynamic enhancement were measured independently, and compared with the measured distance in surgical fresh specimens.n Results:The mean location of tumor upper edge measured in MRI of 73 patients was (1.75±1.98)cm, while measured in the surgical specimen was (1.72±1.97)cm. There was no significant difference between the two groups (n t=0.572, n P=0.569). The intraclass correlation efficient between the two groups was excellent (ICC=0.974, 95% n CI: 0.959-0.984, n P<0.01).n Conclusion:The measurement result of tumor upper edge in MRI is basically consistent with that of surgical specimens. MRI can be used to locate the tumor upper edge for adenocarcinoma of esophagogastric junction before operation.